This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A189659 #4 Mar 30 2012 18:57:25 %S A189659 3,6,7,8,12,15,16,17,19,20,22,23,27,30,33,34,35,39,42,43,44,46,47,49, %T A189659 50,54,55,56,58,59,63,64,65,67,68,72,75,78,79,80,84,87,88,89,93,96,97, %U A189659 98,100,101,103,104,108,111,114,115,116,120,123,124,125,127,128,130,131,135,136,137,139,140,144,145,146,148,149,153,156,159,160,161,163,164,166,167,171 %N A189659 Positions of 1 in A064990; complement of A189658. %C A189659 See A064990. %t A189659 (See A064990.) %Y A189659 Cf. A064990, A189658, A189660. %K A189659 nonn %O A189659 1,1 %A A189659 _Clark Kimberling_, Apr 25 2011